How to Tell If a Propane Tank Has Been Requalified

All propane tanks and cylinders must be inspected and requalified within 12 years of the date they were manufactured, and again every five, seven or 12 years after the initial requalification date, depending on how they were inspected. Propane tanks that have not been requalified before their requalification date can't be refilled until they have passed inspection. It's up to the owner of the propane tank to keep track of the tank's requalification date and ensure the proper inspections are carried out in a timely manner.

Step 1

Find the most recent date stamped on the collar of your propane tank, and note any letters printed immediately to the right of the date. The collar is the raised piece of metal surrounding the propane tank's valve.

Step 2

If there is no letter following the most recent date stamped, then your propane tank was inspected using the external hydrostatic expansion method and must be requalified within 12 years of the date stamped.

Step 3

If there is a letter "S" printed to the right of the most recent date stamped on your propane tank, then your tank was inspected using the internal hydrostatic method and must be requalified within seven years of the date stamped.

Step 4

If there is a letter "E" printed to the right of the most recent date stamped on your propane tank, then your tank was inspected using the external visual method and must be requalified within five years of the date stamped.

Step 5

If the most recent date stamped on your propane tank is less than the five-, seven- or 12-year period required, the tank has been requalified.